How to call npm version to update package version

Nothing happens when I run

npm version minor -m "test"

As a note, there is output if I run npm version without any arguments:

$ npm version
{ 'my-app': '0.7.0',
  npm: '4.2.0',
  ares: '1.10.1-DEV',
  cldr: '30.0.3',
  http_parser: '2.7.0',
  icu: '58.2',
  modules: '51',
  node: '7.10.0',
  openssl: '1.0.2k',
  tz: '2016j',
  unicode: '9.0',
  uv: '1.11.0',
  v8: '5.5.372.43',
  zlib: '1.2.11' }

How am I supposed to use npm-version? I expect it to update the version number in package.json, run the 'version' script that I've specified in the package.json scripts list, and then commit. I can use npm run version to execute the 'version' script that I specified, but how do I run npm-version correctly?

via jmilloy